Visible-light-driven Z-scheme Zn3In2S6/AgBr photocatalyst for boosting simultaneous Cr (VI) reduction and metronidazole oxidation: Kinetics, degradation pathways and mechanism

Sun, Jiangli; Hou, Yanping; Yu, Zebin; Tu, Lingli; Yan, Yimin; Qin, Shanming; Chen, Shuo; Lan, Danquan; Zhu, Hongxiang; Wang, Shuangfei

doi:10.1016/j.jhazmat.2021.126543

Cited by 105 publications

(18 citation statements)

References 68 publications

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“…It was wellknown that a larger surface area of a photocatalyst would endow it with more abundant active sites, thus ensuring good photocatalytic performance. 62 Therefore, the band gaps of g-C 3 N 4 and Vs-Zn 3 In 2 S 6 were calculated to be 2.50 and 2.67 eV, respectively (Figure 6b), and that of Zn 3 In 2 S 6 was 2.75 eV (Figure S3). These results indicated that the introduction of S vacancies could increase the absorption edge of Zn 3 In 2 S 6 , and the construction of CN/Vs-ZIS (Ag/AgCl) + 0.0591 × pH, where E (RHE) is the reversible hydrogen electrode of conversion, E (Ag/AgCl) the E FB measured against the Ag/AgCl reference electrode, and E 0 (Ag/AgCl) the standard potential Ag/AgCl (0.1976 V).…”

Section: Resultsmentioning

confidence: 96%

“…In particular, n was related to the type of semiconductor: n was 1 / 2 for direct band gap semiconductors and 2 for indirect band gap semiconductors. g-C 3 N 4 , Vs-Zn 3 In 2 S 6 , and Zn 3 In 2 S 6 were all indirect band gap semiconductors . Therefore, the band gaps of g-C 3 N 4 and Vs-Zn 3 In 2 S 6 were calculated to be 2.50 and 2.67 eV, respectively (Figure b), and that of Zn 3 In 2 S 6 was 2.75 eV (Figure S3).…”

Section: Resultsmentioning

confidence: 99%

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Significantly Enhanced Photocatalytic Performance of the g-C₃N₄/Sulfur-Vacancy-Containing Zn₃In₂S₆ Heterostructure for Photocatalytic H₂ and H₂O₂ Generation by Coupling Defects with Heterojunction Engineering

Xiao

Zhou

et al. 2022

Inorg. Chem.

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Light-driven splitting of water to produce H2 and reduction of molecular oxygen to synthesize H2O2 from water are the emerging environmentally friendly methods for converting solar energy into green energy and chemicals. In this paper, vacancy defect and heterojunction engineering effectively adjusted the conduction band position of Zn3In2S6, enriched the electron density, broadened the optical absorption range, increased the specific surface area, and accelerated the charge carrier transfer and separation of g-C3N4/sulfur-vacancy-containing Zn3In2S6 (CN/Vs-ZIS) heterostructures. As a result, all of the CN/Vs-ZIS heterostructures possessed greatly enhanced photocatalytic activities and the optimized sample 2CN/Vs-ZIS exhibited the highest visible-light photocatalytic performance. The rate of generation of H2 of 2CN/Vs-ZIS under visible light (λ > 420 nm) was 6.55 mmol g–1 h–1, which was 1.76 and 6.06 times higher than those of Vs-Zn3In2S6 and g-C3N4, respectively, and the apparent quantum yield (AQY) was 18.6% at 420 nm. Meanwhile, the 2 h yield of H2O2 of 2CN/Vs-ZIS was 792.02 μM, ∼4.72 and ∼6.04 times higher than those of pure Vs-Zn3In2S6 and g-C3N4, respectively. The enhanced reaction mechanisms for the production of photocatalytic H2 and H2O2 were also investigated. This work undoubtedly demonstrates that the synergistic effects of defect and heterojunction engineering will be the great promise for improving the photocatalytic efficiency of Zn3In2S6-based materials.

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Section: Resultsmentioning

confidence: 96%

Section: Resultsmentioning

confidence: 99%

Significantly Enhanced Photocatalytic Performance of the g-C₃N₄/Sulfur-Vacancy-Containing Zn₃In₂S₆ Heterostructure for Photocatalytic H₂ and H₂O₂ Generation by Coupling Defects with Heterojunction Engineering

Xiao

Zhou

et al. 2022

Inorg. Chem.

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“…Compared with the Bi 2 Fe 4 O 9 /C fibers (k = 0.027 min À1 ), Bi 2 Fe 4 O 9 /C@AgBr photocatalyst revealed the higher rate constant (k = 0.053 min À1 ), determining that as-prepared catalyst possesses the excellent catalytic efficiency. Tao et al [66] 2 B i 2 Fe 4 O 9 Methyl orange 50 180 Yang et al [60] 3 AgBr/WO 3 RhB -120 Puga et al [40] 4 BiOI/MoS 2 Tetracycline 20 75 Guo et al [67] 5 CdS/BiOBr RhB 250 60 Cui et al [68] 6 BiOBr/Bi 2 WO 6 RhB 5 120 He et al [69] 7 F e 3 O 4 /BiOBr/BiOI RhB 35 80 Li et al [70] 8 Z n 3 In 2 S 6 /AgBr Cr (VI) 50 120 Sun et al [71] 9 BiOCl/TiO 2 Antibiotic 50 150 Bao et al [72] 10 Bi 2 Fe 4 O 9 /C@AgBr RhB 5 60 This work…”

Section: Resultsmentioning

confidence: 99%

Highly efficient photocatalytic organic dyes degradation based on 1D magnetic Bi₂Fe₄O₉/C@AgBr composite

Chen

Liu

et al. 2022

Applied Organom Chemis

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Wastewater treatment has become a research hot issue in recent decade.Organic dyes as one of the main pollutants can change the water behavior. To deracinate the organic pollutants from wastewater, there are numerous methods have been taken into consideration. Photocatalysis is the promising strategy for the dye degradation with low cost, high efficiency, and environmental friendliness. Hence, a novel one-dimensional (1D) magnetic Bi 2 Fe 4 O 9 / C@AgBr composite photocatalyst was prepared employing electrospinning, calcination, and deposition-precipitation methods. The morphology and composition of photocatalyst were characterized, as well as the photocatalytic activities of degrading methylene blue (MB) under visible light were investigated. And the results exhibited that the efficiency of Bi 2 Fe 4 O 9 /C@AgBr under visible light for 60 min is 97.4%. After three cycles, the degradation efficiency of MB could still reach 88.0%. Moreover, radical quenching experiment implicated superoxide radical anions as the primary active species responsible for photodegradation of MB. This work provides a new insight into the design of effective photocatalysts for practical application.

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“…Since Na 2 S was a strong reducing agent which may reduce the photoanode, we selected the mixture of Na 2 S and NaOH as the hole scavenger. Furthermore, the addition of NaOH to Na 2 S solution could inhibit the hydrolysis of S. − A 300 W xenon lamp (PLS-SXE300D, AM 1.5G) was used as the light source with an intensity of 100 mW·cm –2 to simulate sunlight. All electrochemical tests in this work were performed using a CHI920D electrochemical workstation.…”

Section: Methodsmentioning

confidence: 99%

“…Zn 3 In 2 S 6 is a ternary metal sulfide, the band gap energy of which is 2.8 eV. − Because of its stability and it being harmless to the environment and easy-to-prepare, it has been widely studied in the field of photocatalysis . Since the band gap of Zn 3 In 2 S 6 is narrow than that of TiO 2 , it can effectively absorb visible light.…”

Section: Introductionmentioning

confidence: 99%

Zn₃In₂S₆/TiO₂ Nanocomposites for Highly Efficient Photocathodic Protection to Carbon Steel

Zhang

et al. 2022

ACS Appl. Nano Mater.

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Photocathodic protection has evoked great attention in stainless steel protection; however, it has not been fully studied on carbon steel. This study has prepared a series of TiO 2 /Zn 3 In 2 S 6 nanocomposite films by combining anodic oxidation with hydrothermal methods, in which composition and morphology together with optical properties have been characterized. This heterojunction TiO 2 /Zn 3 In 2 S 6 has allowed access to visible-light absorbance. Photoelectrochemical tests suggest that this film can supply effective photocathodic protection to carbon steel. The maximum photogenerated potential drop achieved on TiO 2 / Zn 3 In 2 S 6 -30 coupled to carbon steel is about −0.49 V even after 80 h of illumination, and the corresponding photocurrent is 1.91 mA•cm −2 , which is about 5 times higher than that of pure TiO 2 . This is benefited from the effective photogenerated charge separation by the built-in electric field in the heterojunction. The detailed mechanism has been discussed in the paper.

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Visible-light-driven Z-scheme Zn3In2S6/AgBr photocatalyst for boosting simultaneous Cr (VI) reduction and metronidazole oxidation: Kinetics, degradation pathways and mechanism

Cited by 105 publications

References 68 publications

Significantly Enhanced Photocatalytic Performance of the g-C₃N₄/Sulfur-Vacancy-Containing Zn₃In₂S₆ Heterostructure for Photocatalytic H₂ and H₂O₂ Generation by Coupling Defects with Heterojunction Engineering

Significantly Enhanced Photocatalytic Performance of the g-C₃N₄/Sulfur-Vacancy-Containing Zn₃In₂S₆ Heterostructure for Photocatalytic H₂ and H₂O₂ Generation by Coupling Defects with Heterojunction Engineering

Highly efficient photocatalytic organic dyes degradation based on 1D magnetic Bi₂Fe₄O₉/C@AgBr composite

Zn₃In₂S₆/TiO₂ Nanocomposites for Highly Efficient Photocathodic Protection to Carbon Steel

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Visible-light-driven Z-scheme Zn3In2S6/AgBr photocatalyst for boosting simultaneous Cr (VI) reduction and metronidazole oxidation: Kinetics, degradation pathways and mechanism

Cited by 105 publications

References 68 publications

Significantly Enhanced Photocatalytic Performance of the g-C3N4/Sulfur-Vacancy-Containing Zn3In2S6 Heterostructure for Photocatalytic H2 and H2O2 Generation by Coupling Defects with Heterojunction Engineering

Significantly Enhanced Photocatalytic Performance of the g-C3N4/Sulfur-Vacancy-Containing Zn3In2S6 Heterostructure for Photocatalytic H2 and H2O2 Generation by Coupling Defects with Heterojunction Engineering

Highly efficient photocatalytic organic dyes degradation based on 1D magnetic Bi2Fe4O9/C@AgBr composite

Zn3In2S6/TiO2 Nanocomposites for Highly Efficient Photocathodic Protection to Carbon Steel

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Significantly Enhanced Photocatalytic Performance of the g-C₃N₄/Sulfur-Vacancy-Containing Zn₃In₂S₆ Heterostructure for Photocatalytic H₂ and H₂O₂ Generation by Coupling Defects with Heterojunction Engineering

Significantly Enhanced Photocatalytic Performance of the g-C₃N₄/Sulfur-Vacancy-Containing Zn₃In₂S₆ Heterostructure for Photocatalytic H₂ and H₂O₂ Generation by Coupling Defects with Heterojunction Engineering

Highly efficient photocatalytic organic dyes degradation based on 1D magnetic Bi₂Fe₄O₉/C@AgBr composite

Zn₃In₂S₆/TiO₂ Nanocomposites for Highly Efficient Photocathodic Protection to Carbon Steel